Self lubricating die set pin



1 1931- N. M. MARSILIUS SELF LUBRICATING DIE SET PIN Filed Nov. 7. 1927 ATTORNEY INVENTQR 0/7; an M/Va'rs'dzzzs Patented Nov. 17, 1931 UNITED STATES A CORPORATION OF CONNECTICUT PATENT OFFICE NEWMAN M. MARSILIUS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR, BY MESNE 'AS- I SIGNMENTS, TO THE PRODUCTS MACHINE COMPANY, OF BRIDG-EPORT, CONNECTICUT,

SELF LUBRICATING DIE SET PIN Application filed November '2', 1927. Serial No. 231,534.

The present invention relates to self lubrieating die-set pins, and has for an ob ect to provide a pin of this character of simple and economical construction which will be automatically self-lubricating during the operation of the die-set.

With the above and other objects in view an embodiment of my invention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the'drawings:

Fig. 1 is a perspective view of a die-set provided with four guide-pins according to the present embodiment of the lnventlon.

Fig. 2 is an enlarged elevational view of one of the pins showing the same secured 1n the die-block.

Fig. 3 is a vertical sectional viewof the 1n. p Fig. 4 is a bottom'view of the pin, as shown in Fig. 2.

Referring to the drawings, the die-set comprises a die block 10 and punch-holder 11, the latter beingguided upon four die pins secured in the corners of the block.

As shown in Figs. 2 and 3 the pins 12 are slightly tapered at their lower end, as at 13, and are set in tapered holes 14 in the die block, being secured by means of nuts 15 screwed upon the reduced threaded stud portion 16 of the pin. The nuts are preferably round, slab milled on two sides, as at 17, Fig. 4, and provided with two holes 18 for a spanner wrench. The pin is provided above the taper 13 with flats 19, milled on opposite sides so that the pin may be gripped by a wrench to hold it while the nut 15 is being tightened.

According to the present embodiment of the invention the pin is provided with a longitudinal passage 20, extending therethrough and threaded at each end, as at 21 and 22, for receiving the closure cap-screws 23 and 24, and at suitable intervals duct holes 25 connect the passage 20 to the outer surface of the pin, these holes being inclined upwardly from the passage. A spiral oil groove 26 is preferably provided in the surface of the pin. In the base of the passage 20 there is provided a self-elevating grease compressor,

comprising a base 27 engaging the screw 24, z

a plunger 28, and a helical-spring acting bea tween the base and the plunger to press the .latter upwardly in the passage.

In operation, the passage is filled with grease, being packed to a sufficient extent to depress the plunger 28, so that as the same becomes gradually used the plunger will raise it to the level of the lowermost duct hole 25, as shown in Fig. 3. During operation of the die-set the heat induced by friction between the pin and its bushing, as well as the slight suction caused by the pin passing over the bushing causes the grease to be drawn out through the duct-holes, it being understood that the frictional heat softens the grease in the ducts, so that it readily flows to the surface of the pin. In this manner the pins are continuously lubricated during operation of the die-set, and it is impossible for dirt or grit to get into the grease. grease contained in the pin is suflicient to last over a relatively long period of operation of the die set, so that constant attention and danger of freezing the bearings, as with the usual hand oiling methods, is eliminated.

I have illustrated and described a preferred and satisfactory embodiment of my invention, but it will be obvious that changes may be made therein, Within the spirit and The scope thereof, as defined in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. A guide pin for die sets, the same compassage to said outer surface, a follower in the lower portion of said receptacle, a spring beneath said follower and of a length to move the follower to a position immediately below the lowermost of said ducts, and said ducts at the outer. surface being spaced between the spiral'sof the external groove.

2. A guide pin for die sets, the same comprising an elongated body portion, said body having the same dlfiIlIQtQlTfOl the major portion' ofits length, said body having a: lubricant receiving passage therein, said body being externally spirally grooved, ducts connecting the passage with the outer surface of the body, and said ducts at the outer surface being spaced between the spirals of theexternal groove.

' Signed at Bridgeport in the county of Fairfield. and State of Connecticut this 4th day of November, A. D. 1927.

NEWMAN M. MARSILIUS.

CERTIFICATE OF CORRECTION.

Patent No. 1,832,493. Granted November 17, 1931, to

NEWMAN Mi MARSILIUS.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously written and printed as "The Products Machine Company", whereas said name should have been written and printed as The Producto Machine Company, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of December, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

